<?php

namespace Uuid;

class Uuid {
    /**
     * 生成uuid
     * @param type $prefix
     * @return type
     */
    public static function create($prefix = '') {
        $chars = md5(uniqid(mt_rand(), true));
        $uuid = substr($chars, 0, 8);
        $uuid .= substr($chars, 8, 4);
        $uuid .= substr($chars, 12, 4);
        $uuid .= substr($chars, 16, 4);
        $uuid .= substr($chars, 20, 12);
        return $prefix . $uuid;
    }

}
